Marshall Stanmore III vs Sonos Era 300

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Stanmore III compared with Era 300

	MarshallStanmore III	SonosEra 300
Overview
Released
Released	June 2022	March 2023
Sound
Type
Type	Speaker	Speaker
Channels
Channels	Stereo	–
Dolby Atmos
Dolby Atmos	No	Yes
Drivers
Drivers	One woofer and two tweeters angled outwards, with updated waveguides; bass-reflex cabinet	Four tweeters (a forward-firing mid tweeter, two side-firing mid tweeters and an upward-firing tweeter in a horn) and two woofers angled left and right
Amplifiers
Amplifiers	One 50 W class D for the woofer, two 15 W class D for the tweeters	Six class-D digital amplifiers
Audio formats
Audio formats	–	Dolby Atmos Music
Frequency response
Frequency response	45 Hz – 20 kHz; up to 97 dB at 1 m	–
Room tuning
Room tuning	Placement Correction in the Marshall Bluetooth app; bass and treble knobs on the speaker	Trueplay (iOS and Android); bass, treble and loudness adjustable in the Sonos app
Connections
Wi-Fi
Wi-Fi	No	Yes
Bluetooth
Bluetooth	Yes	Yes
AirPlay
AirPlay	No	Yes
HDMI eARC
HDMI eARC	No	–
Voice assistants
Voice assistants	None	Alexa and Sonos Voice Control
Wi-Fi
Wi-Fi	–	Wi-Fi 6 (802.11a/b/g/n/ac/ax), 2.4 GHz and 5 GHz
Bluetooth
Bluetooth	Bluetooth 5.2, LE Audio-ready; 10 m range	Bluetooth 5.3
Ports
Ports	RCA in, 3.5 mm in, mains power	USB-C for line-in (with the Sonos Line-In Adapter) or Ethernet (with the Sonos Combo Adapter); adapters sold separately
Streaming
Streaming	–	Apple AirPlay 2; direct control from apps such as Spotify and TIDAL; Sonos Radio
Multi-room
Multi-room	None; Marshall says it can't be used in pairs or groups	Groups with other Sonos products over Wi-Fi; two make a stereo pair or Dolby Atmos rear surrounds for a Sonos soundbar
App
App	Marshall Bluetooth app (iOS and Android), with over-the-air updates	Sonos app (iOS and Android)
Design
Weight
Weight	4.25 kg (better)	4.47 kg
Controls
Controls	Source button, volume, bass and treble knobs, play/pause and skip control, power switch	Capacitive touch controls (play, pause, skip, replay, volume, voice mute, grouping); Bluetooth button; microphone switch
Microphones
Microphones	None	Far-field microphone array with beamforming and multichannel echo cancellation; switch cuts power to the microphones
Mounting
Mounting	–	Wall mount and stand sold separately
Size
Size	350 × 203 × 188 mm (W × H × D)	185 × 260 × 160 mm (H × W × D)
Colours
Colours	Black, Cream, Brown	Black, White
In the box
In the box	Stanmore III, mains lead, user manual and legal and safety information	Era 300, power cable (2 m), documentation